Telecommunication Traffic
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Análise de desempenho e proteção em redes ópticas convergentes com chaveamento fotônico / Analysis of performance and protection in convergent optical networks with photonic switching
Neste trabalho investiga-se através de simulação computacional, o desempenho de Redes Ópticas Avançadas, usando tecnologia de Chaveamento de Pacotes Ópticos (Optical Packet Switching - OPS), com topologias em anel e malha, e nós ópticos com roteamento sem conversão eletro-óptica dos pacotes, e sem armazenadores na camada óptica de transporte. São
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2011
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2. Inferindo a fonte e o destino do tráfego anômalo em redes de computadores usando correlação espaço-temporal / Inferring the source and destination of the anomalous traffic in networks using spatio-temporal correlation
Estratégias voltadas para a detecção de anomalias em redes de computadores emitem alarmes como forma de notificação ao administrador de rede. Esses alarmes são essenciais para a gerencia de rede, pois são evidencias de uma anormalidade. Entretanto, uma única anomalia pode gerar um numero excessivo de alarmes, tornando a inspeção manual inviável. N
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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3. Identificação dos parâmetros necessários para análise de rede de estrutura múltipla com base na análise por simulação de fluxo TCP por vazão de fluidos
The major worldwide operators of transport in telecommunication networks have sought tools that, together with traffic statistics, allow their infrastructure to be enabled such that there is no rejection or delay of traffic due to transport capacity. Observing a private network with a considerable geographic size and, for a private high-density network with
Publicado em: 2010
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4. Agregação de tráfego em redes ópticas com multiplexação por comprimetos de onda / Traffic grooming in wavelenght division multiplexing optical networks
Em redes ópticas com multiplexação por comprimento de onda (WDM), a alocação de banda passante ocorre em múltiplos da capacidade de um comprimento de onda, que, nos dias de hoje, corresponde a 40 Gbps. No entanto, a demanda de banda passante dos fluxos em redes IP sobre WDM é da ordem de Mbps, o que é, consideravelmente inferior a capacidade de um co
Publicado em: 2010
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5. Metodo de analise de trafegos VoIP sobrepostos / Method of analysis of VoIP traffic over
The behavior of VoIP traffic in network links is addressed in this work. VoIP applications have strict requirements for quality of service (QoS) that should be provided for in the network design. In this sense, the Markov Modulated Poisson Process (MMPP) is displayed as model of process of arrivals that is appropriate to characterize the behavior of superpos
Publicado em: 2009
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6. Nodes architecture and traffic engineering in optical networks / Arquitetura de nós e engenharia de tráfego em redes ópticas
Integrating telecommunication networks has enlarged the coverage, but has made operations more complex, mainly because of the architecture, formed by various layers. These layers deal with different protocols and transmission rates, as well as electrical and optical signals. The usual alternative of expanding the resources proportionally to the demand is imp
Publicado em: 2009
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7. Estimation of loss probability and an admisssion control scheme for multifractal network traffic / Estimação da probabilidade de perda e um esquema de controle de admissão para trafego multifractal de redes
The present work proposes an analytical expression for estimating the byte loss probability at a single server queue with multifractal traffic arrivals. Initially we address the theory concerning multifractal processes, especially the Holder exponents of the multifractal traffic traces. Next, we focus our attention on the second order statistics for multifra
Publicado em: 2009
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8. Sistemas eixo-raio de múltipla atribuição:: modelos e algoritmos
In telecommunication and transportation systems, the multiple allocation hub location problem arises when we must flow commodities or information between several origin-destination pairs. Instead of establishing a direct node to node connection from an origin to its destination, the flows are concentrated with others at facilities called hubs. These flows ar
Publicado em: 2007
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9. Traffic modelling, policing and scheduling in Ethernet passive optical networks / Modelagem, policiamento e escalonamento em redes Ethernet PON
We propose new framework for traffic modelling, policing and scheduling in Ethernet Passive Optical Networks. This framework aims at providing performance guarantees to individual flows in access networks. We propose a new envelope process called Fractional Bounded Arrival Process for selfsimilar multimedia traffic representation. The policing of such a kind
Publicado em: 2006
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10. O problema da reconfiguração nas redes WDM multifibras
An optical telecommunication network is configured to transmit a given traffic in order to meet a given objective. However the demand changes with time and infrastructure development. The reconfiguration problem stands in this context. It consists in being able to alter the configuration of the network to adjust it to the new traffic. It is generally necessa
Publicado em: 2006
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11. Data traffic dimensioning for 1xEV-DO cellular systems. / Dimensionamento de tráfego de rede de dados para sistema celular 1XEV-DO.
Research regarding voice and data dimensioning models applied to Telecommunication Networks. For circuit switched voice networks dimensioning, the Erlang formulas are used. When it comes to newer data networks, a packet based dimensioning is required, and the complexity is significantly increased due to the diversity of applications and its multiple features
Publicado em: 2006
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12. Avaliação dos modelos de predição de propagação para telefonia móvel celular na cidade do Natal
The development of wireless telecommunication in the last years has been great. It has been taking academics to conceive new ideas and techniques. Their aims are to increase the capacity and the quality of the systems services. Cells that are smaller every time, frequencies that are every time higher and environments that get more and more complex, all those
Publicado em: 2006